干旱区生态环境知识资源中心(Arid): 荒漠草原区不同生活型植物生长对降水变化的响应

Arid

	荒漠草原区不同生活型植物生长对降水变化的响应
其他题名	Responses of plant growth of different life-forms to precipitation changes in desert steppe
	王军锋 1; 张丽华 1; 赵锐锋 1; 谢忠奎 2
来源期刊	应用生态学报
ISSN	1001-9332
出版年	2020
卷号	31 期号:3 页码:778-786
中文摘要	在全球气候变化背景下,降水变化对植物群落动态将产生深远的影响。以黄土高原西部荒漠草原为对象,通过野外降水控制试验,研究不同生活型植物丰富度、密度、盖度、高度和地上生物量对降水变化的响应。结果表明:降水处理对一年生草本植物的丰富度、密度、盖度的影响在降水试验第3年(2015年)达到显著水平,以减水处理最低,植物高度对降水变化的响应更敏感,3年间,均以减水40%处理最低;植物生长和地上生物量对减水处理的负响应幅度大于对增水处理的响应。多年生草本植物的丰富度、密度和盖度在第3年以减水处理显著低于增水40%处理,但与对照无显著差异;植物高度3年间均以减水40%处理最低;丰富度、盖度、高度对减水处理的负响应幅度大于对增水处理的正响应,但地上生物量对增水40%处理的正响应较强。灌木的丰富度、密度、盖度和地上生物量对增减水20%处理的正响应最明显,可能与灌木在该处理分布相对集中有关。降水减少抑制了草本植物的生长,但对一年生草本植物的抑制作用更强,降水增加在一定程度上促进了多年生草本植物的生长和生物量积累。一年生草本植物的生长和生物量随降水年际变异波动明显,灌木受降水改变的影响相对较小,降水变化对黄土高原西部荒漠草原植物群落组成与功能将产生显著的影响。
英文摘要	Under the background of global climate change,precipitation changes will have profound impacts on plant community dynamics. Through field experiment with precipitation manipulation in a desert steppe of western Loess Plateau,we examined the responses of species richness,density,coverage,height and aboveground biomass of different plant life-forms to precipitation changes. The results showed significant effects of precipitation on richness,density and coverage of annual herbs in the third year of manipulation experiment(2015),with lowest values in the decreased precipitation treatments. The height of annual herbs was more sensitive to precipitation changes,and was lowest in the -40% precipitation treatment during three years. The magnitudes of negative response of growth and aboveground biomass of annual herbs to decreased precipitation were larger than that to increased precipitation. Richness,density and coverage of perennial herbs in the decreased precipitation were significantly lower than those in the +40% precipitation in the 3rd year,but were insignificantly different from the control. The height of perennial herbs was lowest in the -40% precipitation treatment during three years. The magnitudes of negative response of richness,coverage and height of perennial herbs to decreased precipitation were larger than positive response to increased precipitation,while the positive response of aboveground biomass to the +40% precipitation treatment was stronger. The positive responses of richness,density,coverage and aboveground biomass of shrub to 20% precipitation treatments were most obvious,which might be related to the relatively concentrated distribution of shrub in these treatments. The precipitation reduction inhibited the growth of herbaceous plants,particularly on the annual herbs,whereas increasing precipitation promoted perennial herbaceous growth and biomass accumulation to some extent. The annual herbaceous growth and biomass fluctuated with interannual variation of precipitation. Shrubs were relatively less affected by precipitation changes. Precipitation changes would have significant effects on plant community composition and function of desert steppe in western Loess Plateau.
中文关键词	荒漠草原 ; 生活型 ; 降水 ; 地上生物量
英文关键词	desert grassland life-form precipitation aboveground biomass
语种	中文
收录类别	CSCD
WOS类目	PLANT SCIENCES
WOS研究方向	Plant Sciences
CSCD记录号	CSCD:6671110
来源机构	西北师范大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/318353
作者单位	1.西北师范大学地理与环境科学学院, 兰州, 甘肃 730070, 中国; 2.中国科学院西北生态环境资源研究院皋兰生态与农业综合试验站, 兰州, 甘肃 730000, 中国
推荐引用方式 GB/T 7714	王军锋,张丽华,赵锐锋,等. 荒漠草原区不同生活型植物生长对降水变化的响应[J]. 西北师范大学,2020,31(3):778-786.
APA	王军锋,张丽华,赵锐锋,&谢忠奎.(2020).荒漠草原区不同生活型植物生长对降水变化的响应.应用生态学报,31(3),778-786.
MLA	王军锋,et al."荒漠草原区不同生活型植物生长对降水变化的响应".应用生态学报 31.3(2020):778-786.